New-to-me used bike, and the adjuster bolts are seized. Very seized. I've tried a whole lot of penetrating oil, tapping, and patient pressure. As of now, one of them is already sheared off flush with the swingarm, and the other is awaiting verdict on its fate. I'm comfortable drilling out and installing a Helicoil, but the problem is that the bolts are so close to the side of the swingarm that I can't get a drill bit (or the Helicoil install tool) to sit straight on the top of the bolt. Does anyone have experience drilling these bolts out, or any other suggestions? Thanks.